Speed-indicator.



J. STROBLE.

SPEED INDICATOR.

APPLICATION FILED APR. 23, 191-1.

1,132,1 3Q, Patented Mar. 16, 1915.

2 SHEETS-SHEET 1.

175i, ira6le J. STROBLE.

SPEED INDICATOR.

APPLICATION FILED 141.28, 1914.

Patented Mar. 16, 1915.

2 SHEETS-SHEET 2.

Elwumtom JOH-N. STRQBLE, or snwnim, KANSAS.

SPEED-INDICATOR.

T all whom it may concern Be it known that I, JOHN STROBLE, citizen of the United States, residing at Seward, in the county of Stafford and btate of Kansas, have invented certain new and useful Improvements in Speed Indicators, of which the following is a specification.

My invention relates to new and useful improvements in speed indicators, the primary objectof my invention being an indicator applicable to moving machinery of any type and so constructed that it may be employed to indicate the speed of the machine to which it is attached, the speed of the different parts of the machine to which it is attached and the speed of another machine driven by the machine to which it is attached.

A further object of my invention is to construct an indicator of the above described character, the action of which is not dependent upon swinging lever arms, meshing gears and like complicated and easily disarranged parts.

A still further object of my invention is to construct an indicator which may be readily thrown into or out of operative osition, thus greatly increasing the life 0 the indicator as it need be employed only at such times as the speed of the machine is to be taken.

With these and other objects in view, my

ing the means employed for throwing the 1 indicator into and out of operative position; Fig. 4. is a front elevation of the dial employed in my indicator.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters. 7

In order to insure a clear understanding Specification of Letters Patent.

Patented Mai. 16,1915.

Application filed April 28,1914. Serial No. 835,049.

of my indicator it should be noted that in use the indicator is driven by a plunger which in turn is driven by any suitable reciprocating part of the machine or engine,

- the speed of which is to be indicated by it.

My indicator includes a tubular shank 0r body portion 10 screw threaded at one end as shown at 11 in order that it may be secured in the frame or other suitable part of the machine, the speed of which is to be indicated with its threaded endopening adja'cent a reciprocating part of such machine or engine. The upper end of the body portion 10 is internally threaded to receive the threaded stem 12 of a bearing head 13 which carries the cylindrical casing or dial housing 14. This head with its stem 12 is provided with a vertically formed bore 15 and the head is further formed witha socket 16 extending at an angle to and communicating with the bore 15.

A plunger, indicated as a whole by the numeral 17, is mounted for reciprocation in the body portion 10 of the indicator and in the head 13, this lunger being in the form of a rod 18 provided at its upper and lower ends with cam heads 19and 20, respectively, having oppositely inclined terminal faces 21 and 22. These cam heads are cylindrical in shape, the former being proportioned to fit snugly in the bore 15 of the bearing head 13, while the latter is proportioned to fit in like manner in the lower end of the body portion 10.. The body portion 10 is provided with a vertically formed slot 23 and a pin 24 seated at one end in the rod 18 extends at its other end through the slot 23 to limit the vertical movement of the plunger and to normally support it with the cam face 22 of. the lower cam head 20 extending below. the lower end of the body portion 10. A helical spring'25 bears between the lower end of the'bearing head 13 and this pin 21 to normally maintain the plunger in such lowered position. As shown, the cam heads are preferably provlded with threaded sockets to receive the threaded terminals of the rod 18 in order that either or both of the cam heads may be readily removed and replaced 'bynew ones in case of wear. I

Referring particularly to Fig. 2 of the drawings, it will be noted that when the teeth in the ratchet wheel 32. It will therefore be clear that the indicating needle 44 "will, at all times, point to one or the other I one scale divisions, the numbers upon the inner scale running from Zero to fifty and those on scale from zero to three hundred, the numberin each of the scale divisions of the scale B being six times the number in the corresponding scale division of the inner scale A. As the scales A and B are for a different purpose from the scales C, D 15 and E, the operation and use of the former scales will be explained at this point.

The dial plate, illustrated in Fig. 4 is intended to be employed upon an indicator which is to be thrown intooperation for pcriods of ten seconds, that is, the locking cam 37 is released for a period of ten seconds and then again swung to locked position. I will assume that, under such circumstances, the indicator needle is removed from its normal position at the zero of the scales A and B to the position shown in Fig. 4: of the drawings. It will be clear that, under these circumstances, the cross head of the engine is reciprocated twenty-five times during ten seconds as clearly indicated by scale A. The scale B illustrates the number of reciprocations of the cross head per minute as will be readily understood from a comparison of the figures inscribed upon the two scales A and B. After a speed reading .has been taken in this manner, the indicator needle may be returned to normal position by again releasing the locking cam 37 or merely by manually turning the needle in a clockwise directi'on until it reaches the zero divisions ofthe scales A and B, At this point it should be noted that the drive pulley 50 of the engine will revolve once for each reciprocation of the cross'head 46 and that the scales A and B therefore indicate the number of revolutions of this pulley. Assuming that the diameter of this drive pulley 50 is thirty-six inches and that the diameter of the pump pulley 52 is twelve inches, it will be clear that- When the pump is driven by the belt 51, the

. pulley 52 will be revolved three times for each revolution of, the pulley 50. In like manner, if the diameter of the pulley 52 were 9 inches, it would be revolved four times for each revolution of the pulley 5O and. if its diameter was-six inches it would berevolved six times for each revolution of the pulley'50. For this reason'I provide the scales C, D and E which indicate the number of revolutions of twelve, nine and six inch pulleys per minute when driven by a thirty six inch drive'pulley, the speed of which isindicated by the scale B. With such an arrangement of scales, it will be clear that the indicator will not only indicate the speed at which the engine is operating but also the speed at which a pump,

threshing machine or other machine is being driven by the engine.

As most pulleys in common use are either twelve, nine or six inch pulleys, the above dial having the five scales inscribed will be sufiicient. However, additional dials having scales for various sized drive pulleys and driven pulleys and, if desirable, scales for twenty or thirty seconds, instead of ten seconds, may be supplied with each indicator in order to permit of practically universal use of the indicator. Furthermore, if

'certain parts of the engine or of the machine to which the indicator is attached are driven at different speed ratios to the part with which the indicator engages, similar dials having scales disclosing these different ratios may be employed and the indicator therefore employed to indicate directly the speeds at which the various parts of the machine are moving.

From the foregoing description it will be apparent that I have provided an extremely simple, efiicient and convenient form of speed indicator and one capable of a vast range of use. It will be understood however, that I do not wish to be limited to the specific details illustrated and described as various changes, within the scope of the ap-.

pended claims, may be made at any time desired without'in the slightest degree departing from the spirit of my invention.

The indicator casing will of course be provided with a transparent face plate of glass to protect the dial from dust and at the same time permit reading of the needle positions.

Having thus described the invention, what is claimed as new is 1. A speed indicator including a' body adapted for attachment to a machine, a

plunger mounted for reciprocation in the body adapted for application in the path of f a moving machine part, a bearing head detachably connected to one end of the body, a casing supported by and partially inclosing the head, an indicator mechanism supported in the casing, and co-acting plungers recip- In testimony whereof I afix mysignature rficeillydsgpported in guideways fomfiad in presence-of two Witnesses.

t e ea oro erative en a ement wit eac other, one of izhe plunge rs extending from T the opposite end of the body member and Witnesses:

the other operatively engaging the indicator WILLIAM H. Bnscmm mechanism. Wnmmm P. Bmmm. 

